“A Solar Flux Density Calculation,” Waltzel, Lipps, Vant-Hull, Solar Energy Lab

“A Solar Flux Density Calculation,” Waltzel, Lipps, Vant-Hull, Solar Energy Lab, Box: 68, Folder: F286. Karl Wolfgang Böer papers, MSS 0483. University of Delaware Library Special Collections. https://findingaids.lib.udel.edu/repositories/2/archival_objects/90619 Accessed September 07, 2024.